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/* $NetBSD: stdarg.h,v 1.6 1995/01/28 01:52:21 jtc Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)stdarg.h 8.2 (Berkeley) 9/27/93
*/
/*
* SPARC stdarg.h
*/
#ifndef _SPARC_STDARG_H_
#define _SPARC_STDARG_H_
#include <machine/ansi.h>
typedef _BSD_VA_LIST_ va_list;
/*
* va_start sets ap to point to the first variable argument.
* The `last fixed argument' parameter l is ignored (and should
* never have been included in the ANSI standard!).
*
* va_end cleans up after va_start. There is nothing to do there.
*/
#ifdef __GCC_NEW_VARARGS__ /* gcc 2.4.5 */
#define va_start(ap, l) ((ap) = (va_list)__builtin_saveregs())
#else /* gcc 2.3.3 */
#define va_start(ap, l) (__builtin_saveregs(), \
(ap) = (va_list)__builtin_next_arg())
#endif
#define va_end(ap) ((void) 0)
#if __GNUC__ == 1
#define __extension__ /* hack for bootstrapping via gcc 1.x */
#endif
/*
* va_arg picks up the next argument of type `ty'. Appending an
* asterisk to ty must produce a pointer to ty (i.e., ty may not be,
* e.g., `int (*)()'). In addition, ty must not be any type which
* undergoes promotion to some other type (e.g., char): it must
* be the promoted type instead.
*
* Gcc-2.x tries to use ldd/std for double and quad_t values, but Sun's
* brain-damaged calling convention does not quad-align these. Thus,
* for 8-byte arguments, we have to pick up the actual value four bytes
* at a time, and use type punning (i.e., a union) to produce the result.
* (We could also do this with a libc function, actually, by returning
* 8 byte integers in %o0+%o1 and the same 8 bytes as a double in %f0+%f1.)
*
* Note: we cannot use the union trick (which generates better code) for
* C++, since `ty' might be a type with a constructor (these may not appear
* in a union).
*
* The extraneous casts through `void *' avoid gcc alignment warnings.
*/
#ifdef __cplusplus
#define __va_8byte(ap, ty) ({ \
int __va_i[2]; \
__va_i[0] = ((int *)(void *)(ap))[0]; \
__va_i[1] = ((int *)(void *)(ap))[1]; \
(ap) += 8; *(ty *)(void *)__va_i; })
#else
#define __va_8byte(ap, ty) ({ \
union { ty __d; int __i[2]; } __va_u; \
__va_u.__i[0] = ((int *)(void *)(ap))[0]; \
__va_u.__i[1] = ((int *)(void *)(ap))[1]; \
(ap) += 8; __va_u.__d; })
#endif /* __cplusplus */
#define va_arg(ap, ty) __extension__ ({ \
ty __va_temp; /* to check for invisible-ptr struct-valued args */ \
__builtin_classify_type(__va_temp) >= 12 ? \
((ty **)(void *)((ap) += sizeof(ty *)))[-1][0] : \
sizeof(ty) == 8 ? __va_8byte(ap, ty) : \
((ty *)(void *)(ap += sizeof(ty)))[-1]; })
#endif /* !_SPARC_STDARG_H_ */
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